Tub beater



Aug. 26, 193,0. R. H. BREYFOGLE 1,774,195

' TUB BEATER Filed Feb. 3, 1927 2 Sheets-Sheet l 1 Z576 of@ f Zvw/f -vAug. 26, 1930.

R. H. BREYFOGLE TUB BEATER Filed Feb. 3, 1927 2 Sheets-Sheet 2 PatentedAug. 2e, 1930 ROYQBREYFOGIQE. 0F V.tirar-111iJeifilaila mleieAN:

' fffrif BEK-PEF? l' *Appiietion'mea February 3,1927. serial No.yiesgssaj i i The present improvementsfrelate more particularly to abeater ofthe continuous type for reducing stock to'pulp, commonlyknownas a tub beater. A Y Y l -5 The invention relates-more specificallyto tub beaters of the continuous type in 4which pulp which hasbeen'reduced to'the desired size or inen'ess, is continuously withdrawnfrom the moving mass .of pulp in the beater,r

' i0 while regulated quantitiesof fresh charge are added,l eithercontinuously or intermittentlywithout interrupting the continuousoperationofthe machine.

In its more specific embodiment, the yinven-kvv 15 tion comprises aperforated plate forming part of, or placed in the hood `normally disvposed over the'beater roll, through `which Vthe pulp, which hasbeenreducedto the degree of neness desired is dischargedby thecen-k 20trifugal rotary action of the beater. d

As a feature ofthe present invention,' this perforated plate is disposedimmediately above, or on the same side of thebeater roll as the usualback fall.l l

25. The advantage accruing to the placing of this perforated plateon thesame Side ofthe roll i* as is located the back fall., is that the maxifd .35AV force.

Pulp passing through s'aidperforatedplat'e7 is withdrawn through adischarge pipe communicating with the usual stuff chest or other obviousinstrumentality.

4Q Many other-'objects and advantages will be more particularly apparentfrom the followvr y f .andin any'event; aredisposed on thejsamefingdescript1on.` y d y In the drawings, Fig. l is anenlarged top plan vieuTof a tub beater equippeddwitli my 45; invention. n y l Y Fig. 2 is apartly side elevational view and partly a crosssection` taken online'2-2 of Fig. l. i y l Referring more in detailzto the' drawings, lEOirepresents the usual tank of al tub beater beatingz'r'ollfhavingitsupper outer end car-w y 1., 6,5# the ""centerzlineof saidroll; from.` whence itwhich isprovidedvwiththeusual mid feather y 2 'ofsuitable length.A Ashaft 3 `rotated -by means of power imparted tothepulley'pwheel U l carried thereby pr'oje'cts-across the interiorefthetubi'and onenesiaeqfthe miafeatheif 55 Qcarries the beaterfroll v5.Y VThis beaterfroll 5 is provided'withfthe.usualfcutting knivesV 6 I Yprojecting fromits surfac'e5` and designedito coactvwith a fixed memberfsu-pported'in the customarymanner'at thebottom of the' tank 60Q bymeans'of'the support* 8. The back fallv 9' extendsV .upwardly r adjacent to, but i at an increasingidistancefrom the4 surface of 4the *yried.toavheightapproximately at kthe level of extends baok'wiardzat anapproximate angle ofy v about' deg'rees'tr theibo'ttom ofthe tank@`'Ilhis backffall 9 is of anyf'standar'di const'ruction.y c, 21A. hoodIOis. suitably supported on the upd per annular edge of the tank l, whichhood c may befof" anyshapeordesign as willbe found most-:suitable andconvenient.` vThis hood vmay. be provided ywith therings 11, 'for '.757,l f

the purpose' of permittingfraijsingby suitable instrumentality. 'Thehood is provided'with sidewalls 12, whichv defi-nea space intwhich"pulprilslfreceived and 'discharged throughA v leither of the dischargeypipes 13 .to a suitable V80," -stuff chest or other instrumentality. Y

l' As a `feature ofthe present inventionyon the same sidev of the* drum`5 as islocatedthe .y back fall 9, I provide abovesaid back fall aperforatedplate-lil. Thisplate lll` has perl 85.*. c

forationsjl,4 the sizel and number vof which arefpredetermined to permitonly the pulp n which has been yreduced to the desired fine- Vness andsize Vto pass therethrough.. The per- Y forations 15 in this plate 14'are ]g re`ferabl5f` .90 disposed immediately above :the back fall '9,

side yofthe beater roll as t'lieback fall 9ffor the purposeofaltiliziiig thecentrifugalV force set up by the-rotationrof thebeating roll-,tocause d the pulp toj be thrown upwardly against .l theunder surface fofy the plateffatwhich time the: n pulp. rwhichl has.been reduced to desired'size,

passes through the perforations.v It is obvi-V ous thatthereisa minimumof loss of force by Af .y

v ceiving an excess of pulp, the valve comprisf ing the weir gate 16 maybe manipulated t0 clear the opening 17in an end rwall ofthe hood thuspermitting the overflow to pass int-o the conduit 18 which returns saidpulp to the mass in the tank 1.

I am aware that heretofore, beaters of the contin.uoustype have beenknown in the prior art. I am also aware that the prior art disgclcsescontinuous beaters utilizing a perforated back fall andutilizinga-perforated plat-e onthe opposite side of the beater roll fromthat on which the back fall is located in combination with anelem'entfor removing the larger pieces which might adhere to the perforatedsurface.v

The present invention has obviousadvantages thereover, among which maybe pointed out the greater capacity due to taking advantage of themaximumcentrifugal force set up by the revolving beater roll 5,y and theeliminationof the necessity forinechanical scraping' or cleaning refuse,that is the foreignwmatter of larger size Ithan theperforations,` whichis objectionable inthe particuyliar grade of stock which it is desiredtoprouce. It has been found in use that the centrifn remove said largersize particles `from they surface of the perforated plate. vTheinsuiiiciently reduced pulp is thrown back into the ybeatingengine'while the suiciently reduced fibres pass through the perforations and onto the stuff. chest. The operation is continuous, and highlyefiicient.

I claim; asmy invention:

1. A pulping machine.comprising a beater tub. a beater roll mounted forrotation in said tub. a back fall on one side of said roll and slightlyspaced'therefrom, aperforated strainer element mounted in the upperportion ofsaid tub on the back fall side of said roll and disposeddirectly over the spacebetween said roll andback falhv and means forconducting away thekinaterial discharged through said element. y

2. A pulping machine comprising a beater tub, al beater roll mounted forrotation in said tub, abackfall von one side of said roll and slightlyspaced therefrom, a perforated plate mounted in-the upper portion ofsaid tub on the back fall side of said roll and dis-V posed directlyover the space between said point beyond the top of said back fall, andI `means on the side of said plate opposite the roll for conducting awaymaterial discharged r through the plate.

ROY H. BREYFOGLE.

